mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 07:37:36 +07:00
a0b1280368
Depending on configuration mem_section can now be an array or a pointer
to an array allocated dynamically. In most cases, we can continue to
refer to it as 'mem_section' regardless of what it is.
But there's one exception: '&mem_section' means "address of the array"
if mem_section is an array, but if mem_section is a pointer, it would
mean "address of the pointer".
We've stepped onto this in kdump code. VMCOREINFO_SYMBOL(mem_section)
writes down address of pointer into vmcoreinfo, not array as we wanted.
Let's introduce VMCOREINFO_SYMBOL_ARRAY() that would handle the
situation correctly for both cases.
Link: http://lkml.kernel.org/r/20180112162532.35896-1-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Fixes: 83e3c48729 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y")
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
77 lines
3.0 KiB
C
77 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef LINUX_CRASH_CORE_H
|
|
#define LINUX_CRASH_CORE_H
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/elfcore.h>
|
|
#include <linux/elf.h>
|
|
|
|
#define CRASH_CORE_NOTE_NAME "CORE"
|
|
#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
|
|
#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
|
|
#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
|
|
|
|
/*
|
|
* The per-cpu notes area is a list of notes terminated by a "NULL"
|
|
* note header. For kdump, the code in vmcore.c runs in the context
|
|
* of the second kernel to combine them into one note.
|
|
*/
|
|
#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
|
|
CRASH_CORE_NOTE_NAME_BYTES + \
|
|
CRASH_CORE_NOTE_DESC_BYTES)
|
|
|
|
#define VMCOREINFO_BYTES PAGE_SIZE
|
|
#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
|
|
#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
|
|
#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
|
|
VMCOREINFO_NOTE_NAME_BYTES + \
|
|
VMCOREINFO_BYTES)
|
|
|
|
typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
|
|
|
|
void crash_update_vmcoreinfo_safecopy(void *ptr);
|
|
void crash_save_vmcoreinfo(void);
|
|
void arch_crash_save_vmcoreinfo(void);
|
|
__printf(1, 2)
|
|
void vmcoreinfo_append_str(const char *fmt, ...);
|
|
phys_addr_t paddr_vmcoreinfo_note(void);
|
|
|
|
#define VMCOREINFO_OSRELEASE(value) \
|
|
vmcoreinfo_append_str("OSRELEASE=%s\n", value)
|
|
#define VMCOREINFO_PAGESIZE(value) \
|
|
vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
|
|
#define VMCOREINFO_SYMBOL(name) \
|
|
vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
|
|
#define VMCOREINFO_SYMBOL_ARRAY(name) \
|
|
vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
|
|
#define VMCOREINFO_SIZE(name) \
|
|
vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
|
|
(unsigned long)sizeof(name))
|
|
#define VMCOREINFO_STRUCT_SIZE(name) \
|
|
vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
|
|
(unsigned long)sizeof(struct name))
|
|
#define VMCOREINFO_OFFSET(name, field) \
|
|
vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
|
|
(unsigned long)offsetof(struct name, field))
|
|
#define VMCOREINFO_LENGTH(name, value) \
|
|
vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
|
|
#define VMCOREINFO_NUMBER(name) \
|
|
vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
|
|
#define VMCOREINFO_CONFIG(name) \
|
|
vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
|
|
|
|
extern u32 *vmcoreinfo_note;
|
|
|
|
Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
|
|
void *data, size_t data_len);
|
|
void final_note(Elf_Word *buf);
|
|
|
|
int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
|
|
unsigned long long *crash_size, unsigned long long *crash_base);
|
|
int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
|
|
unsigned long long *crash_size, unsigned long long *crash_base);
|
|
int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
|
|
unsigned long long *crash_size, unsigned long long *crash_base);
|
|
|
|
#endif /* LINUX_CRASH_CORE_H */
|